Panorama uncovered several facts about how prepared businesses and authorities in the UK would be in the event of a major terrorist attack in London.

Here are eight key statistics used in the programme.

1, Police, ambulance and fire services communications systems are not compatible underground. They are not compatible with each other across England and Wales and are not compatible with each other in London.

2, The Civil Contingency Reaction Force (CCRF) communications system is not compatible with those of the emergency services. It would take up to 12 hours to have 100 CCRF people available.

3, The Metropolitan Police dedicated Chemical, Biological, Radiological and Nuclear (CBRN) unit has 30 officers. The London Ambulance Service has sent 186 frontline staff (or one person in nine) through CBRN training. Local authority staff in England and Wales have no CBRN training

Every year since 2001, the Government has refused requests to increase local authority annual funding for emergency planning. The annual budget for the whole of England and Wales is £19million.

Fact 7

4, The CBRN police reserves carry protective suits with them at all times. Most other CBRN trained officers would actually have to return to base to collect their suits before being deployed to the scene of a disaster.

5, No specific national guidance has been issued for schools or care homes, although some schools or care homes may have devised their own plans.

6, More than half of businesses in the UK do not have emergency plans of any kind in place.

7, Every year since 2001, the government has refused requests to increase local authority annual funding for emergency planning. The annual budget for the whole of England and Wales is £19million.

8, Local authorities and the police are in the frontline of alerting the public in the event of a terrorist attack. However, the national siren network was dismantled in 1992/93 and has not been replaced.